Hypermobility means your joints move beyond the usual range of motion, so someone may be extra flexible or “double-jointed.” It is often harmless, but if it causes pain, frequent sprains, or joint instability, it can be part of a hypermobility-related condition.

What it looks like

Common signs can include:

  • Bending joints farther than most people.
  • Easily doing flexibility “tricks,” like placing hands flat on the floor or bending thumbs/back knees unusually far.
  • Feeling joint pain after activity or repeated movement.
  • Having more injuries, such as strains, sprains, or dislocations.

When it matters

Some people are simply flexible and have no problems. For others, hypermobility can come with symptoms like pain, weakness, or unstable joints, which is why it may need medical attention.

Related terms

You may also hear:

  • Joint hypermobility : the joint moves farther than expected.
  • Hypermobility syndrome or hypermobility spectrum disorder : when symptoms cause problems.
  • hEDS : hypermobile Ehlers-Danlos syndrome, a connective tissue condition linked with hypermobility.

Simple example

A person who can bend their elbow or thumb much farther than average might be hypermobile. If that flexibility causes repeated pain or injuries, it is no longer just a “party trick” and may need evaluation.

Bottom line

Hypermobility is extra joint flexibility, and it can range from a harmless trait to a symptom of a condition that affects daily life.